Standard No.:	GB/T 12371-2025
English Name:	Bevel gears—Information of the dimensional data to be given on the drawing
Chinese Name:	锥齿轮 图样上应注明的尺寸数据
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-8-29
Implemented on:	2026-3-1
Status:	to be valid
Superseding:	GB/T 12371-1990 Bevel gears-Information of the dimensional data to be given on the drawing
Target Language:	English
File Format:	PDF
Word Count:	9000 words
Translation Price(USD):	270.0
Delivery:	via email in 1~3 business day

GB/T 12371-2025 Bevel gears—Information of the dimensional data to be given on the drawing English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS 21.200 CCS J 17 The People's Republic of China National Standard GB/T 12371-2025 replaces GB/T 12371-1990 Bevel Gears-Dimensional Data to be Indicated on Drawings Issued on 2025-08-29 Implemented on 2026-03-01 Issued by State Administration for Market Regulation Standardization Administration of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 General Dimensional Data to be Indicated on Drawings 5 Data and Parameters to be Listed in Tables 6 Other Appendix A (Informative) Drawing Exampl Bevel Gears-Information of the Dimensional Data to be Given on the Drawing 1 Scope This document specifies the dimensional data to be indicated on the drawings for straight bevel gears, skew bevel gears, intersecting axis spiral bevel gears, and hypoid gears. This document applies to the dimensional annotation of drawings for straight bevel gears, skew bevel gears, intersecting axis spiral bevel gears, intersecting axis cycloidal bevel gears, and hypoid gears with offset axes. 2 Normative References The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, subsequent amendments (excluding corrigenda) or revisions to these documents do not apply. For undated references, the latest edition of the document (including any amendments) applies. GB/T 2821 Gear geometry symbols GB/T 3374.1 Gears - Terminology and definitions - Part 1: Geometric definitions GB/T 11365 Bevel gears - System of accuracy GB/T 12369 Basic tooth profile for straight and skew bevel gears GB/T 12370 Bevel and hypoid gears - Terminology 3 Terms and Definitions The terms and definitions established in GB/T 2821, GB/T 3374.1, and GB/T 12370 apply to this document. 4 General Dimensional Data to be Indicated on the Drawing The general dimensions to be indicated on the drawing include but are not limited to: Tip diameter and its tolerance Face width (b) Face angle (δa₁,₂) Root angle (δf₁,₂) Pitch angle (δ₁,₂) Back angle (δb₁,₂) Bore (shaft) diameter and its tolerance Locating surface (mounting reference surface) Mounting distance (distance from the pitch cone apex to the locating surface, and its tolerance; or distance from the crossing point to the locating surface, and its tolerance Crown to back (distance from the tooth tip at the large end to the locating surface) and its tolerance Distance from the front cone face to the locating surface Tooth surface roughness (if required, including surface roughness at the tooth root and root fillet) Offset distance (for hypoid gears with offset axes) and its tolerance